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在外电供电时，usb鼠标和键盘能够使用，重新插拔不能够使用，重启时插上u盘不能够使用！不加外电vbus没有电压输出！求大神！！！
http://www.deyisupport.com/question_answer/f/25.aspx
请到这里提问，这个系列我没接触过
谢谢
